Question for IOCL Diploma Engineer (Mechanical) 2026 - Quiz / Questions / MCQ

Objective Questions

Latest IOCL Diploma Engineer Exam Question (Objective Questions), MCQ in English

Subjects : Domain Knowledge, Quantitative Aptitude, Logical Reasoning, English Language

Question Bank IOCL Diploma Engineer (Mechanical) Exam - English

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Domain Knowledge

Question 1Single Answer

The branch of engineering primarily concerned with machines, energy and manufacturing is:

A
Civil engineering
B
Chemical engineering
C
Mechanical engineering
D
Electronics engineering

Question 2Single Answer

The SI unit of force is:

A
Joule
B
Newton
C
Pascal
D
Watt

Question 3Single Answer

Work is said to be done when a force produces:

A
Displacement
B
Temperature
C
Pressure only
D
Density

Question 4Single Answer

The SI unit of work is:

A
Watt
B
Pascal
C
Newton
D
Joule

Question 5Single Answer

Power is defined as:

A
Mass per unit volume
B
Force per unit area
C
Work done per unit time
D
Energy per unit mass

Question 6Single Answer

The SI unit of power is:

A
Joule
B
Kelvin
C
Newton
D
Watt

Question 7Single Answer

Mechanical advantage of a machine is the ratio of:

A
Load to effort
B
Effort to load
C
Velocity to acceleration
D
Work input to load

Question 8Single Answer

Efficiency of an ideal machine is:

A
0%
B
100%
C
50%
D
25%

Question 9Single Answer

A lever is basically a rigid bar that turns about a fixed point called:

A
Pitch point
B
Fulcrum
C
Centre of gravity
D
Vertex

Question 10Single Answer

In a first-class lever, the fulcrum is located:

A
At the load point
B
At the effort point
C
Beyond the load
D
Between effort and load

Question 11Single Answer

A wheelbarrow is an example of a:

A
First-class lever
B
Third-class lever
C
Second-class lever
D
Compound pendulum

Question 12Single Answer

A pair of scissors is an example of a:

A
First-class lever
B
Second-class lever
C
Third-class lever
D
Hydraulic machine

Question 13Single Answer

The property of a body by virtue of which it resists change in its state of motion is:

A
Elasticity
B
Ductility
C
Plasticity
D
Inertia

Question 14Single Answer

Newton's first law of motion is also known as the law of:

A
Momentum
B
Gravitation
C
Inertia
D
Acceleration

Question 15Single Answer

Newton's second law relates force to the rate of change of:

A
Volume
B
Temperature
C
Density
D
Momentum

Question 16Single Answer

According to Newton's third law, action and reaction are:

A
Always perpendicular
B
Unequal and parallel
C
Equal and same in direction
D
Equal and opposite

Question 17Single Answer

Momentum is the product of mass and:

A
Acceleration
B
Displacement
C
Force
D
Velocity

Question 18Single Answer

The tendency of a force to rotate a body about a point is called:

A
Moment
B
Impulse
C
Pressure
D
Strain

Question 19Single Answer

The centre of gravity of a uniform circular disc lies at its:

A
Circumference
B
Edge
C
Top surface
D
Centre

Question 20Single Answer

Friction acts in a direction that:

A
Opposes relative motion
B
Assists relative motion
C
Is always vertically upward
D
Is always horizontally forward

Question 21Single Answer

Static friction acts when two contacting surfaces are:

A
Moving rapidly
B
Completely separated
C
Not sliding relative to each other
D
Melting

Question 22Single Answer

The coefficient of friction is generally:

A
Dimensionless
B
Measured in newtons
C
Measured in joules
D
Measured in watts

Question 23Single Answer

Rolling friction is generally:

A
Greater than sliding friction
B
Equal to fluid friction
C
Less than sliding friction
D
Infinite

Question 24Single Answer

Lubrication between moving surfaces primarily reduces:

A
Density
B
Volume
C
Mass
D
Friction and wear

Question 25Single Answer

The ability of a material to regain its original shape after removal of load is:

A
Plasticity
B
Brittleness
C
Elasticity
D
Hardness

Question 26Single Answer

The ability of a material to undergo permanent deformation without rupture is:

A
Plasticity
B
Elasticity
C
Brittleness
D
Rigidity

Question 27Single Answer

The ability of a material to be drawn into wires is called:

A
Ductility
B
Malleability
C
Hardness
D
Toughness

Question 28Single Answer

The ability of a metal to be hammered or rolled into thin sheets is:

A
Malleability
B
Ductility
C
Brittleness
D
Creep

Question 29Single Answer

The ability of a material to resist indentation is called:

A
Hardness
B
Plasticity
C
Conductivity
D
Porosity

Question 30Single Answer

Density is defined as:

A
Volume per unit mass only
B
Weight per unit area
C
Force per unit volume
D
Mass per unit volume

Question 31Single Answer

Specific gravity is the ratio of density of a substance to the density of:

A
Air
B
Mercury
C
Oil
D
Water

Question 32Single Answer

A machine that converts mechanical energy into electrical energy is a:

A
Pump
B
Boiler
C
Compressor
D
Generator

Question 33Single Answer

A machine that converts electrical energy into mechanical energy is a:

A
Boiler
B
Motor
C
Condenser
D
Turbine

Question 34Single Answer

A pump is primarily used to:

A
Move liquids
B
Compress solids
C
Produce electricity
D
Measure temperature

Question 35Single Answer

A compressor is primarily used for:

A
Increasing gas pressure
B
Increasing liquid density only
C
Reducing gas pressure
D
Measuring force

Question 36Single Answer

A boiler is a device used for generating:

A
Compressed air
B
Refrigerant
C
Vacuum only
D
Steam

Question 37Single Answer

A turbine converts fluid energy mainly into:

A
Nuclear energy
B
Chemical energy
C
Mechanical energy
D
Magnetic energy

Question 38Single Answer

A flywheel is mainly used to:

A
Store rotational energy
B
Increase friction
C
Reduce shaft diameter
D
Measure temperature

Question 39Single Answer

A bearing is used mainly to:

A
Measure pressure
B
Generate steam
C
Cut threads
D
Support and guide a rotating shaft

Question 40Single Answer

A coupling is used to connect:

A
Two cylinders
B
Two pistons
C
Two gears only
D
Two shafts

Question 41Single Answer

A clutch is used to:

A
Permanently weld shafts
B
Engage and disengage power transmission
C
Measure speed
D
Increase temperature

Question 42Single Answer

A brake is used primarily to:

A
Increase speed
B
Generate electricity
C
Increase pressure
D
Reduce or stop motion

Question 43Single Answer

Gears are commonly used to transmit:

A
Rotary motion and torque
B
Heat only
C
Fluid pressure
D
Electrical current

Question 44Single Answer

A belt drive is especially suitable when shafts are:

A
Coaxial only
B
Separated by a relatively large distance
C
At zero distance
D
Permanently fixed together

Question 45Single Answer

A chain drive provides:

A
Only linear motion
B
Large intentional slip
C
No torque transmission
D
Positive drive without slip

Question 46Single Answer

A spring is primarily used to:

A
Reduce density
B
Generate steam
C
Store mechanical energy
D
Melt metals

Question 47Single Answer

The main function of a gasket is to:

A
Measure length
B
Increase shaft speed
C
Produce sparks
D
Prevent leakage at joints

Question 48Single Answer

A key is used between a shaft and hub to:

A
Prevent relative rotation
B
Increase leakage
C
Increase shaft flexibility
D
Measure torque

Question 49Single Answer

A riveted joint is generally considered a:

A
Temporary joint
B
Permanent joint
C
Sliding joint
D
Flexible bearing

Question 50Single Answer

A bolted joint is normally classified as a:

A
Permanent joint
B
Temporary joint
C
Welded joint
D
Adhesive joint only

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Quantitative Aptitude

Question 51Single Answer

The cash difference between the selling prices of an article at a profit of 4% and 6% is Rs. 3. The ratio of the two selling prices is:__________ ?

A
51:52
B
52:53
C
51:53
D
52:55

Question 52Single Answer

Which of the following numbers is irrational ?

A
√49
B
0.125
C
√2
D
22/7

Question 53Single Answer

356 x 936 – 356 x 836 = ?

A
35600
B
34500
C
9630
D
93600

Question 54Single Answer

Arrange in descending order: 5/8, 7/10, 3/4

A
3/4 > 7/10 > 5/8
B
7/10 > 3/4 > 5/8
C
3/4 > 5/8 > 7/10
D
5/8 > 7/10 > 3/4

Question 55Single Answer

What is (3^{^}{4} times 9^{^}{2}) ?

A
3⁶
B
3⁸
C
3¹⁰
D
9⁶

Question 56Single Answer

If 3⁴X^-2 = 729, then find the value of X.

Question 57Single Answer

Convert 0.6 into fraction ?

A
3/5
B
2/3
C
4/5

Question 58Single Answer

The no. plate of a bus had peculiarity. The bus number was a perfect square. It was also a perfect square when the plate numbers were reversed. The bus company had only five hundred buses numbered from 1 to 500. What was the number ?

A
169
B
36
C
196
D
Can not say

Question 59Single Answer

If a and b are positive integers, such that ab = 125, then (a-b)^a+b-4= ?

A
16
B
25
C
28
D
30

Question 60Single Answer

If x^*y = x² + y² – xy, then value of 9^*11 is

A
93
B
103
C
60.5
D
121

Question 61Single Answer

Passage :

Direction : Each of the questions below consists of a question and two statements numbered (I) and (II) given below it. You have to decide whether the data provided in the statements are sufficient to answer the question. Read both the statements and give answer :

How many employees of bank ‘X’ opted for VRS ?
(I) 18% of the 950 officer cadre employees and 6% of the 1100 of all other cadre employees opted for VRS.
(II) 28% of the employees in the age group of 51 to 56 and 17% of the employees in all other age groups opted for VRS.

A
Statement (I) ALONE is sufficient, but statement (II) alone is not sufficient
B
Statement (II) ALONE is sufficient, but statement (I) alone is not sufficient
C
BOTH statements TOGETHER are sufficient, but NEITHER statement alone is sufficient
D
EACH statement ALONE is sufficient

Question 62Single Answer

Passage :

The area of a playground is 1600 square meters. What is its perimeter ?
(I) It is a perfect square playground
(II) It costs Rs.3200 to put a fence around the playground at the rate of Rs.20 per meter.

A
Statement (I) ALONE is sufficient, but statement (II) alone is not sufficient
B
Statement (II) ALONE is sufficient, but statement (I) alone is not sufficient
C
BOTH statements TOGETHER are sufficient, but NEITHER statement alone is sufficient
D
EACH statement ALONE is sufficient

Question 63Single Answer

Passage :

What is the value of m – n ÷ 37 ?
(I) m is the largest possible six-digit number and n is the smallest possible six-digit number.
(II) The difference between m and n is known.

A
Statement (I) ALONE is sufficient, but statement (II) alone is not sufficient
B
Statement (II) ALONE is sufficient, but statement (I) alone is not sufficient
C
BOTH statements TOGETHER are sufficient, but NEITHER statement alone is sufficient
D
EACH statement ALONE is sufficient

Question 64Single Answer

Passage :

What is the value of x ?
(I) If 10 is added to x, the result is 34.
(II) If x is multiplied by y, the result is 38.

A
Statement (I) ALONE is sufficient, but statement (II) alone is not sufficient
B
Statement (II) ALONE is sufficient, but statement (I) alone is not sufficient
C
BOTH statements TOGETHER are sufficient, but NEITHER statement alone is sufficient
D
EACH statement ALONE is sufficient

Question 65Single Answer

Passage :

What was the total compound interest on a sum after three years ?
(I) The interest after one year was Rs. 100 and the sum after was Rs.1000.
(II) The difference between simple and compound interest on a sum of Rs.1000 at the end of two years was Rs.10.

A
Statement (I) ALONE is sufficient, but statement (II) alone is not sufficient
B
Statement (II) ALONE is sufficient, but statement (I) alone is not sufficient
C
BOTH statements TOGETHER are sufficient, but NEITHER statement alone is sufficient
D
EACH statement ALONE is sufficient

Question 66Single Answer

Passage :

Each of the questions below consists of a question and two statements numbered (1) and (2) given below it. You have to decide whether the data provided in the statements are sufficient to answer the question. Read both the statements and give answer.

Among Japanese Yen, Australian Dollar, Hong Kong Dollar and Singapore Dollar, which currency has the lowest value in terms of Indian rupees ?
(1) One rupee is equal to 2.56 Japanese Yen, 0.338 Australian Dollar, and 0.465 Hong Kong Dollar.
(2) Value of Australian Dollar is equal to Singapore Dollar.

A
Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient
B
Statement (2) ALONE is sufficient, but statement (I) alone is not sufficient
C
BOTH statements TOGETHER are sufficient, but NEITHER statement alone is sufficient
D
Statements (1) and (2) TOGETHER are NOT sufficient

Question 67Single Answer

Passage :

What is the value of a two-digit number ?
(1) The sum of the two digits is 4.
(2) The difference between the two digits is 2.

A
Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient
B
Statement (2) ALONE is sufficient, but statement (I) alone is not sufficient
C
BOTH statements TOGETHER are sufficient, but NEITHER statement alone is sufficient
D
Statements (1) and (2) TOGETHER are NOT sufficient

Question 68Single Answer

Passage :

What was the population of State ‘A’ in 1999 ?
(1) Population of the State increases every year by 20% and its population in 1997 was 1,20,000.
(2) Population of State A in 1997 was twice that of State B in the same year.

A
Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient
B
Statement (2) ALONE is sufficient, but statement (I) alone is not sufficient
C
BOTH statements TOGETHER are sufficient, but NEITHER statement alone is sufficient
D
Statements (1) and (2) TOGETHER are NOT sufficient

Question 69Single Answer

Passage :

What is the speed of the boat in still water ?
(1) It takes 2 hours to cover the distance between A and B downstream.
(2) It takes 4 hours to cover the distance between A and B upstream.

A
Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient
B
Statement (2) ALONE is sufficient, but statement (I) alone is not sufficient
C
BOTH statements TOGETHER are sufficient, but NEITHER statement alone is sufficient
D
Statements (1) and (2) TOGETHER are NOT sufficient

Question 70Single Answer

Passage :

How many vinyl squares with sides 5 inches long will be needed to cover the rectangular floor of a room ?
(1) The floor is 5ft long.
(2) The floor is 3 ft wide.

A
Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient
B
Statement (2) ALONE is sufficient, but statement (I) alone is not sufficient
C
BOTH statements TOGETHER are sufficient, but NEITHER statement alone is sufficient
D
Statements (1) and (2) TOGETHER are NOT sufficient

Logical Reasoning

Question 71Single Answer

How many such pairs of letters are there in the word ‘CLEANLINESS’ each of the which has as many letters between them in the word as they have in the English alphabet, in the same sequence?

A
Two
B
Three
C
Five
D
Four
E
None of these

Question 72Single Answer

Team A has scored more goals than Team B
Team C has scored fewer goals than Team B
Team A has scored fewer goals than Team C .
If the first two statements are true, the third statement is

A
True
B
False
C
Uncertain
D
None

Question 73Single Answer

If it is possible to make only one meaningful word with the second, the third, the sixth and the eight letters of the word FRAGMENT using each only once, which of the following will be the third letter of that word ? If no such word can be formed, give ‘X’ as the answer and if more than one such word can be formed, give ‘Y’ as the answer.

Question 74Single Answer

How many such letters are there in the word ORIENTAL each of which is as far away from the beginning of the word as when they are arranged alphabetically?

A
None
B
One
C
Two
D
Three
E
More than three

Question 75Single Answer

How many such pairs of letters in the word CREDIT each of which has as many letters between them in the word as in the English alphabet?

A
None
B
One
C
Two
D
Three
E
More than three

Question 76Single Answer

How many meaningful words can be made from the letters ‘LMEA’ using each letter only once in each word?

A
None
B
One
C
Two
D
Three
E
More than three

Question 77Single Answer

If it is possible to make only one meaningful word with the first, the second, the seventh and the eighth letters of the word TEMPORAL, which of the following will be the first letter of that word? If more than one such word can be made, give ‘Y’ as the answer and if no such word can be made, give ‘X’ as the answer.

Question 78Single Answer

If the letters of the word HANDOVER are arranged alphabetically from left to right how many letters will remain at the same position?

A
None
B
One
C
Two
D
Three
E
More than three

Question 79Single Answer

How many such pairs of letters are there in the word EXCURSION, each of which has as many letters between them in the word as they have in the English alphabet?

A
None
B
One
C
Two
D
Three
E
More than three

Question 80Single Answer

If it is possible to make only one meaningful word with the first, the second, the third, the sixth and the eighth letters of the word DEVIATION first letter of that word is your answer? If more than one such word can be made formed your answer is ‘A’ and if no such word can be formed your answer is ‘B’.

Question 81Single Answer

Passage :

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z .

Which letter in this alphabet is the eighth letter to the right of the letter and which is tenth letter to the left of the last but one letter of the alphabet ?

Question 82Single Answer

Passage :

Direction : The following question is based on the five words given below:
AND FOR THE BIG SUM (The new words formed after performing the mentioned operations may or may not necessarily the meaningful English words.)

If the third alphabet of each of the words is changed to the next alphabet in the English alphabetical series, which of the following will form a meaningful English word?

A
SUM
B
BIG
C
Both BIG and THE
D
FOR
E
Both FOR and BIG

Question 83Single Answer

Passage :

Direction : The following question is based on the five words given below:
AND FOR THE BIG SUM (The new words formed after performing the mentioned operations may or may not necessarily the meaningful English words.)

If the given words are arranged in the order as they would appear in a dictionary from left to right, which of the following will be second from the right ?

A
AND
B
FOR
C
THE
D
BIG
E
SUM

Question 84Single Answer

Passage :

Direction: The following question is based on the five words given below:
AND FOR THE BIG SUM (The new words formed after performing the mentioned operations may or may not necessarily the meaningful English words.)

If second alphabet in each of the words is changed to next alphabet in the English alphabetical order, how many words having two vowels (same or different vowels) will be formed ?

A
None
B
One
C
Two
D
Three
E
Four

Question 85Single Answer

Passage :

How many letters are there in the English alphabetical series between the second letter of the word which is second from the right and the second letter of the word which is second from the left of the given words?

A
Two
B
Five
C
Six
D
Nine
E
Three

English Language

Question 86Single Answer

I go to Madurai by —– Vaigai Express

A
a
B
an
C
some
D
the

Question 87Single Answer

Have the car stolen!

A
Steal the car
B
You should have the stolen car
C
Get someone to steal the car
D
They have stolen the car

Question 88Single Answer

The payment was collected by the hardworking salesman.

A
The hardworking salesman collected the payment.
B
the salesman who worked heard was able to collect the payment.
C
to collect the payment the salesman had to work hard.
D
The hardworking salesman was able to collect the payment.

Question 89Single Answer

I had to stop all my work to complete this project.

A
All other work had to be stopped to complete this project by me
B
For completing this project all other work must be stopped
C
For completing this project I had to stop all my work
D
To complete this project all other work had been stopped by me

Question 90Single Answer

They have published the names of all the successful candidates.

A
The candidates who have succeeded their names they had published.
B
The names of all the successful candidates have been published by them
C
The candidates who have succeeded their names have been published by them.
D
The names of all the successful candidate were published by them.

Question 91Single Answer

The online shopping site lowered the prices.

A
Lowering of the prices was done by the online shopping site
B
The prices were lowered by the online shopping site
C
The prices had been lowered by the online shopping site
D
The prices have been lowered by the online shopping site

Question 92Single Answer

Who taught you to drive a truck ?

A
To drive a truck by whom were you taught?
B
Driving a truck by who were you taught?
C
Driving a truck by who were you being taught?
D
By whom were you taught to drive a truck?

Question 93Single Answer

We shall invite Suresh.

A
Suresh would be invited by us
B
Suresh would have been invited by us
C
Suresh will be invited by us
D
Suresh will have been invited by us

Question 94Single Answer

Dark clouds have overcast the evening sky.

A
By the dark clouds the evening sky was overcast.
B
The evening sky has been overcast by the dark clouds.
C
Dark clouds overcastted the evening sky.
D
The sky of the evening was overcasted by dark clouds.

Question 95Single Answer

The partners will celebrate their triumph tomorrow.

A
The triumph would be celebrated by the partners a day before
B
The triumph would be celebrated by the partners a day after
C
The triumph would have been celebrated by the partners a day after
D
The triumph will have been celebrated by the partners tomorrow

Question 96Single Answer

Passage :

Direction : Question below has two blanks, each blank indicting that some thing has been omitted. Choose the word for each blank which best fits the meaning of the sentence as a whole.

The Finance Department has ……………a centralized online databank system for all statutory government bodies to …………an eye on their assets and liabilities.

A
presented , stay
B
introduced , keep
C
announce , make
D
created , let
E
proclaimed , hold

Question 97Single Answer

Passage :

Direction : The five items in this section consists of a word or group of words followed by four words as (a), (b), (c) and (d). Select the word which is nearly opposite to the meaning of the original word or group of words and mark your response as (a), (b), (c) and (d), as the case may be, in your Answer Sheet.

Assets

A
liabilities
B
responsibilities
C
estates
D
profits

Question 98Single Answer

Passage :

Direction : In the question, out of the four alternatives, choose the word which is opposite in meaning to the given word and click the button corresponding to it

Affidavit

A
Affirmation
B
Slander
C
Oath
D
Testimony

Question 99Single Answer

Passage :

Direction: In the following question, out of the four alternatives, choose the word which is opposite in meaning to the given word and click the button corresponding to it

Hollow

A
Alveolate
B
Cleft
C
Cavernous
D
Solid

Question 100Single Answer

Passage :

Directions: In the following question, out of the four alternatives, choose the word which is opposite in meaning to the given word and click the button corresponding to it

Cosset

A
Ignoreb
B
Close
C
Caress
D
Fondle

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